Analysis of Branched Interface Cracks

[+] Author and Article Information
D. J. Mukai, G. R. Miller

Department of Civil Engineering, University of Washington, FX-10, Seattle, WA 98195

R. Ballarini

Department of Civil Engineering, Case Western Reserve University, Cleveland, OH 44106

J. Appl. Mech 57(4), 887-893 (Dec 01, 1990) (7 pages) doi:10.1115/1.2897657 History: Accepted February 22, 1989; Received February 22, 1989; Online March 31, 2008


A solution is presented for the problem of a finite length crack branching off the interface between two bonded dissimilar isotropic materials. Results are presented in terms of the ratio of the energy release rate of a branched interface crack to the energy release rate of a straight interface crack with the same total length. It is found that this ratio reaches a maximum when the interface crack branches into the softer material. Longer branches tend to have smaller maximum energy release rate ratio angles indicating that all else being equal, a branch crack will tend to turn back parallel to the interface as it grows.

Copyright © 1990 by The American Society of Mechanical Engineers
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